Blender V2.61 - r43446

SCA_RandomNumberGenerator.h

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00001 /*
00002  * ***** BEGIN GPL LICENSE BLOCK *****
00003  *
00004  * This program is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU General Public License
00006  * as published by the Free Software Foundation; either version 2
00007  * of the License, or (at your option) any later version.
00008  *
00009  * This program is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License
00015  * along with this program; if not, write to the Free Software Foundation,
00016  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
00017  *
00018  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
00019  * All rights reserved.
00020  *
00021  * The Original Code is: all of this file.
00022  *
00023  * Contributor(s): none yet.
00024  *
00025  * ***** END GPL LICENSE BLOCK *****
00026  */
00027 
00035 #ifndef __KX_RANDOMNUMBERGENERATOR
00036 #define __KX_RANDOMNUMBERGENERATOR
00037 
00038 #ifdef WITH_CXX_GUARDEDALLOC
00039 #include "MEM_guardedalloc.h"
00040 #endif
00041 
00042 class SCA_RandomNumberGenerator {
00043 
00044     /* reference counted for memleak */
00045     int m_refcount;
00046 
00048     long m_seed;
00049 
00050     /* A bit silly.. The N parameter is a define in the .cpp file */
00052     /* unsigned long mt[N]; */
00053     unsigned long mt[624];
00054 
00056     int mti; /* initialised in the cpp file */
00057 
00059     void SetStartVector(void);
00060  public:
00061     SCA_RandomNumberGenerator(long seed);
00062     ~SCA_RandomNumberGenerator();
00063     unsigned long Draw();
00064     float DrawFloat();
00065     long GetSeed();
00066     void SetSeed(long newseed);
00067     SCA_RandomNumberGenerator* AddRef()
00068     {
00069         ++m_refcount;
00070         return this;
00071     }
00072     void Release()
00073     {
00074         if (--m_refcount == 0)
00075             delete this;
00076     }
00077     
00078     
00079 #ifdef WITH_CXX_GUARDEDALLOC
00080 public:
00081     void *operator new(size_t num_bytes) { return MEM_mallocN(num_bytes, "GE:SCA_RandomNumberGenerator"); }
00082     void operator delete( void *mem ) { MEM_freeN(mem); }
00083 #endif
00084 };
00085 
00086 #endif /* __KX_RANDOMNUMBERGENERATOR */
00087